Gravity tamping and molding machine for plastics.



N0.'s5s.232. PATENTED JUNE 25. 1907.

' A. J. TAYLOR & J. H. MGOLURE.

GRAVITY TAMPING AND MOLDING MACHINE FOR PLASTICS. APPLIOATION FILED sEP'r. 7,1906.

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' WITNESSES. N l ENTRRS.

PATENTED JUNE 25; 1907.

A. J. TAYLOR & J. H. MOGLURB. GRAVITY TAMPING AND MOLDING MACHINE FOR PLASTIGS..

APPLICATION FILED SEPT- 7,1906.

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UNITED STATES PATENT orrron 4 ALFRED .J. TAYLon AND JOSEPH H. MoCLURE, or WATERVILLE, orno.

GERAVITY TAMPING AND MDLDING MACHINE FOR PLASTICS.

Specificationof Letters IPatent.

Patented June 25, 1907.

Application filed September 7,1906, Serial No. 333,639.

To all whom, it may concern:

Be it known that we, ALFRED J. TAYLOR and JOSEPH H. MoCLUnn, citizens of the United States, residing at Naterville, in thetion.

and molding machine for plastic and molten material, and has for its object to provide a 1 simple and inexpensive machine of the kind whereby concrete and other material in a molding is hereinafter described and .ill'us Y longitudinal vertical section through the liftplastic state is conveniently tampedand accurately molded at a uniform density, by its owngravity. "We accomplish theseobjects by providing a machine that is adapted to raise and drop a mold or molds at short intervals and through gradually reduced distances while the material is being poured therein. A preferred form of mechanism by which .we utilize this principle of tamping and trated in the drawings,in which I Figure 1 is a perspective view showing an end elevation of a machine constructed in accordance with our invention. Fig. 2 is a adjuster. Fig. 3 is an end view of the same, with the supporting .beam shown in cross section, on line 2-2 of Fig. 1. Fig. 4 is a vertical section on lines :2c."c and y-y of Fig. 1. and Fig. 5 is a front elevation of the machine with the front cross beam removed.

In the drawings 1. represents a support or base, which is preferably constructed of timbers and comprises the sill beams 2 extending parallel at regular intervals, the companion cross beams 3 and 4, and the adjustable cross beam 5, which are mounted on and suitably secured to the sills at rightangles thereto. I

The base 1 is mounted on a suitable concrete bed or other suit able foundation 7, having embedded therein the bumper plates or blocks 8, which are located between sills and alined below the space between the cross beams 3 and 4, which are located across the front end portions of the sills. Opposite, to the inner sides of the beams 3 and 4, and above each of the bumper blocks 8 are vertically secured the companion guide cleats 9 between which and the beams 3and 4 are Our invention relates toa gravity tamping reciprocally mounted the pedestals 10, to the top ends of which are suitably attached mold bases 11, adapted to support and retain various forms of molds.

with a longitudinal rectangular guide groove 12, and there is movably mounted thereon over the space between the sills 2 between which the bumper blocks 8 and the edestals 10 are located, the lift adjuster bloc 13, the lower faces of which are planes coinciding with the upperfacc of the beam' 5 and the upper face an inclined plane of suitable pitch. The lower faces of the adjuster blocks 13 are each provided with tongues 14 which extend into the groove 12 and guide the blocks along the upper face of the beam 5. Centrally of their lengths and widths the adjuster blocks 13 are provided with elongated mortises 15,

which extend vertically through the blocks,

the mortises being each equal to the width of the groove 12 of the beam and of a length to permit of the desired distance of movement of the adjuster blocks back and forth along the beam. i

Central between the sills .2 over which the adjuster blocks are mounted as aforesaid, and in vertical alinement with the mortises 15, the beam 5 is provided with suitable mortises 16, to movably receive the suspension rods 17, which extend vertically through the.

mortises l6 and 15 and through mortises 18 alined with the mortises 16, in the bearing blocks 19 mounted on the blocks 13, and each having its under face formed as an incline complementary to and engaging the inclines of the adjuster blocks 13. l

The suspension rods 17 each have their upper end portions threaded toreceive a bearing nut 20 which pendently supports the rod on its bearing block 19. At their lower ends the suspension rods are each provided with a bifurcated fulcrum head 21 and the bifurcations of the heads are each .provided with The cross beam 5 is provided in its top face axially alined bores, in which are mounted, I

transverse the heads, the fulcrum pins 22. Each fulcrum head bestrides a lever beam 23, central of the length of the beam, which at and at suitable intervals forward of, its center is provided with suitable transverse bores 22 for mounting the lever on a fulcrum 22'.

of the sills, with their rear end portions vertically below cam wheels 24, whichare fixedly mounted on a shaft 25, that is revolubly mounted in suitable bearings 26-, secured in alinement to rear end portions of the sills. The rear ends of the lever beams 23 are in alinenient with vertical lines diametric of the cam wheels, and their front end portions are provided with the bifurcated heads 27, the bifurcations of which extend on opposite sides of the pedestals 10, and the bifurcations of each. head are providedwith elongated pivot slots 28, by which they are pivotally mounted on pivot pins 29, fixedly mounted in axial alinement therewith in the lower end portions of the pedestals 10.

The cam wheels 24, the body portions of which are concentric to the shaft, have eccentric cam portions provided with abrupt terminations 30, the abrupt termination of each cam portion being atthe beginning of the next cam. The beginnings of the cams are eccentric to the shaft, and the outer faces of the cams extend therefrom in curves of increased eccentricity to their abrupt terminations, which are of such increased radius as to dproduce a desired maximum depression an release of. the rear ends of. the lever beams 23.- 4

Normally when the pedestals are resting on the bumper blocks, and the adjuster blocks are pushed inward under the bearing the plates are secured to the s11 blocks unt the outer ends of their mortises 15 are in engagement with the suspension rods 17, the tops of the rear end portions of. the lower beams are engaged with the beginnings of cams of the cam wheels 24.

The cross beam of each end portion is mounted on plates 31 let into the tops of the outer sills 2 flush with their up er faces, and

f; bythe bolts 32, as shown in Fig. 4

To adjustably secure the beam 5 to the sill plates, it has bolted theretoon opposite sides above the sill plates the angle plates 33, with the lower legs of the angle plates resting on the plates 31. The lower legs 34 of the angle plates are each provided with a bolt hole to receive a stud screw 35, and the sill plates, at suitable intervals to register with the bolt holes of the legs 34, and locate thebeam 5 in different regular 'positions,are screw tapped to receive the screws 35, by which the beam 5, when adjusted to a desired position, is firmly secured to the outersills, each position of the beam being adapted to register the bores in the fulcrum heads for the fulcrum pins with a fulcrum bore 22 of the lower eams.

By this arrangement of the parts, the distance of upward lift of the pedestals is increased. as the fulcrums are shifted toward the cam wheels, and diminished as they are shifted toward the pedestals, such li t being pqualf to thef dial projection of the abrupt in such ,obtaine and when an adjuster block is riation of the lift during the operation of. the

levers, by means of the adjuster blocks 13, which at their outer and enlarged ends have attached thereto by the connecting rods 36 the hand levers 37, the connectingrods being pivotally attached to the levers 37 betweentheir handles 38 and their fulcrums 39, which are pivotal attachments of the lower ends of the levers to the ends of the beam 5. The

levers'37, above the connecting rods 36, are

provided with the ratchet dogs 37 adapted to engage the ratchet teeth of arc'racks 40,,

which are provided one for each lever, and

suitably attached to the beam 5 at each end.

The suspension rods 17 are each adjust-ed by the nut 20 to such length that when the adjuster blocks are pushed" inward under the bearing blocks 19 by the levers 37, until they are in engagement with the suspension rods at the outer ends of the inortises '15,- theupper faces of the rear end portions of the lever beams-23 are each in engagement with the beginning of a cam of their respective cam wheels so that when the adjuster blocks are osition the full lift of each lever is pulled outward by its lever the lift is reduced equal to the distance the bearing block 19 is lowered thereby, and according to the grad- 'uated distances established by the teeth of tl e racks.

The cam shaft has mounted thereon at one end a pulley 41, by which it is revolved. The pulleyv being connected by a belt (not shown) to any convenient source of power,

. and the levers being adjusted to any desired maximum lift. by the adjustment of the beam- 5, and any desired molds 42 being secured.

on the mold bases of the pedestals, material in a plastic or semi-liquid state is poured into the topsof the molds from any suitable or convenient source, (not shown), and the cam shaft being set in motion at thev same time, the levers are depressed and released by each cam, thereby successively lifting and dropping the pedestals and the molds on the bumper blocks, as the material is poured into the molds, the jar of the drop of the pedestals and the suddenarrest of the material in the molds operating to tamp it evenly in every part of the mold by its own gravity, which compacts its particles together and conforms them to all parts of the molds. As the filling of the molds progresses and the weight of the material increases, the lift and drop of the molds is gradually-reduced by the adjustment of the adjuster blocks by the levers 37, so that by the time the molds are filled the material therein is thoroughly and form density and free from air eaaasa evenly tamped and a perfect casting of uni mortises are in engagement with the sus pension rods 17, the lever beams are dropped entirely free of the cams of the cam wheels,

and the lifting and dropping ceases while the ;--In olds are being removed and others are subfstrtuted therefor on the mold bases, which being done, the levers 37 are thrown inward :to the inward limit of the movement of the adjuster blocks, and the operation of filling von-the shaft to alternately lift and drop the and tamping as described is repeated.

Preferably the cam Wheels are arranged molds, whereby while one mold is being re- Y moved, and replaced by another mold, a

moldis being filled and tam ed.

' 1 It ismanifest that a mac 'ne constructed in accordance with our invention'may be in definitely extended to operate any number r of single or pairs of molds by the same line of shaftingLexte nded, wherefore we dp pot having an incline bearing face, a vertically limit ,turselveswme operation "of a single pair of molds as herein shown; It is further manifest that it is adapted to thefilling and tamping any form of mold and of different forms of molds at the same time and that it is especially adapted to the molding and tamping of concrete and other plastic materials around metal reinforcements where the ordinary process of tamping is inadequate and difiicult, andthat it greatly reduces the cost of labor in tampin all kinds of molds. It is further manifest t at the principle of the operationkis adapted to the mold ng of V molten material and to obviate the defects due to heated air or gases confined in the mass, and to obtain a uniform density, smoothness of surface. and to sharply define the outlines of the mold in the casting roduced. Our machine is also adapte to form from plastic material in. suitabre molds cast molds-"Which are a'daptedsto the tamp- 6o 3 semi-fluid and plastic materials, the combimg and molding therein of castings made from molten material. 7

What we claim to be new is:

1. In a machine for tamping and molding semi-fluid and plastic materials, the combination with a bumper, a mold base movably mounted on the bumper, a mold mounted on -the mold base, and means to successively at short intervals raise and drop the mold base on the bumper While the mold. is being filled, of means to gradually. reduce the height-of the lift and drop of the mold base during the filling of the mold.

1 2. In a machine for tamping and molding .:nation with a bumper, a mold base mounted onthe bumper and adapted to be raised and dro ped thereon, a mold mounted on. the

mo dbase, a lever adapted to; lift the mold base, and means a apted to engage and disengage the lever nd operate the lever to successively lift and drop the mold base at f short intervals on the bumper while the mold is being filled, of means to gradually reduce the height ofl the lift of'the lever during'the' filling of the mold, by gradually shifting the fulcrum of, the lever, substantially as set forth;

3. In a machine for tamping and molding semi-fluid and plastic; materials, the combination with a bumper, a moldbase mounted on the bumper and adapted to be raised and.

dropped thereon, a mold mounted on the mold base, a lever adapted to'lift the mold base, and a Wheel having cam projections adapted to successively engage andpdisen-v gage the lever at short intervals, and operate the lever to successively" lift and drop the mold base on the bumper while the'mold isbeing filled, of means to gradually reduce the height of the lift of the lever during the filling of the mold, comprising a stationary support, a horizontally movable lower bearing suppgrt mounted on the support, and

movable upper bearin sulpport mounted on the horizontally movable ower 'bearingsupport, and having an incline face complementary to and engaging the incline face of the horizontally movable support, a suspension rod pendently supported by the upper bearing support andpendently supporting 4. In a machine for teeming and molding plastic and semi-fluid materials, the combination with a bumper, a vertically movable mold base normally supported by the bumper, a moldmounted on the mold base and a lifting beam pivoted at one end to the mold base, of astationary support, a lower bearing block mounted on and horizontally movable on the stationary support, and provided with an upper bearing face inclined to the horizontal, a vertically movable upper bearing block, having an inclined lower bearing face reversely inclined complementary to and engaged with the inclined face of the lower bearing block, means to pendently and Leen trally support and fulcrum the lifting beam on the upper bearing'block, a shaft revolubly mounted on the stationary support, a wheel mounted on the shaft over the free end of the lifting beam, a wheel having a plurality of wiper cams adapted to' successively engage and depress the free end portion of the lifting beam, and disengage themselves therefrom,

and a lever connected to the lower bearing block, adapted to move it along the sta tionary support and gradually lower the upper bearing block and the lifting beam, substantially as set fortlr;

5. In a machine for tamping and molding plastic and semi-fluid materials, the combination with a plurality of bumpers each having a vertically movable mold support normally supported thereon, of a plurality of lever beams, one for each mold support, and having one end portion pivotally connected to the mold support, a stationary support, a cam shaft'journaled on the stationary support, a plurality of'cam wheels mounted on the shaft, one for each lever beam, each cam "Wheel having a plurality of cam projections,

provided with abrupt terminations at their oints of greatest eccentricity, and means to fulcrum each lever beam between its mold support and its cam Wheel, with its free end in engagement with its cam wheel in position to be depressed and then released by each cam projection as'the Wheel revolves, substantially as set forth.-

6. In a machine for tamping and molding plastic and semi-fluid materials, the combination with a plurality of bumpers each having a vertically movable mold support normally supported thereon, of a plurality of lever beams, one for each mold support, and having one end portion pivotally connected to the mold support, a stationary support, a cam shaft j ournaled on the stationary support, a plurality of cam Wheels mounted on the shaft, one for each lever beam, each cam wheel having a plurality of cam'projections,

provided with abrupt terminations at their points of greatest eccentricity, and means to adjustablyfulcrum each lever beam between its mold su port and its cam wheel,with its free end in. engagement with the cam wheel in positions to be variably depressed and then released by each cam projection as the wheel revolves, substantially as set forth.

In Witness whereof, we have hereunto signed our names in the presence of two subscribing Witnesses, this eighteenth day of August, 1906.

ALFRED J. TAYLOR. JOSEPH H. McCLURE. In presence of,

WM. J. FRrrscHE, JOHN F. MULLARKEY. 

